Age: Approved from 6 months onwards in many countries
Dose for 6-12 months:2.5 mg once daily (usually 2.5 mL of a 1 mg/mL syrup)
This is a second-generation antihistamine - less sedating, preferred in infants
Generally safe with fewer side effects than older antihistamines
✅ Alternative - Chlorpheniramine Maleate (e.g., Cadistin, Piriton syrup)
Dose for infants under 1 year:1 mg (1 mL) every 4-6 hours - but only under doctor's advice
First-generation antihistamine - can cause drowsiness or paradoxical excitability in infants
Use only if cetirizine is unavailable
⚠️ Diphenhydramine (Benadryl syrup) - USE WITH CAUTION
NOT recommended for children under 2 years without medical supervision
Risks include respiratory depression and excessive sedation in infants
For Pain or Fever (if present)
Paracetamol (Crocin/Calpol syrup): 10-15 mg/kg every 4-6 hours - safe from birth
Ibuprofen: can be used from 6 months onwards, 5-10 mg/kg per dose
Topical Options (Safer First Step)
1% Hydrocortisone cream - apply sparingly to bite area 2-3x/day
Calamine lotion - soothing for itching
Do NOT use topical Benadryl cream - gets absorbed through infant skin and can cause systemic side effects
⚠️ Go to a Doctor Immediately If:
Swelling of face, lips, or tongue
Difficulty breathing or wheezing
Hives spreading over the body
Baby becomes very drowsy, pale, or lethargic
Fever develops
Bite becomes red, warm, swollen, or oozes fluid after 48 hours (sign of infection)
Sting was from a bee, wasp, or scorpion
Bottom line: For a simple itchy insect bite in an 11-month-old, Cetirizine 2.5 mg syrup once daily is the safest antihistamine option. Apply calamine lotion or hydrocortisone cream locally first. Always confirm the exact dose with your child's doctor based on the baby's current weight.
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